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1·Unclamp. One time a serie of ten is much less work than 10 times a single!

一时间，意甲的10要少得多的工作超过10倍，一个单一的！

2·Join, must both hands hold pipes and pipe fittings tight, keep enough cooling time, cool back hand can unclamp to certain extent, continue and install the next pipe.

连接完毕，必须双手紧握管材和管件，保持足够的冷却时间，冷却到一定程度后手方可松开，继续安装下一段管材。